# 520 conversion and sprockets...questions

**URL:** <https://forums.speedlife.net/t/520-conversion-and-sprockets-questions/50289>\
**Category:** NYSpeed Automotive\
**Created:** [June 19, 2008, 6:16pm UTC](https://forums.speedlife.net/t/520-conversion-and-sprockets-questions/50289 "2008-06-19T18:16:59Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Dex](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dex/32/7210_2.png) [@Dex](https://forums.speedlife.net/u/Dex)\
**Post date:** [June 19, 2008, 6:45pm UTC](https://forums.speedlife.net/t/520-conversion-and-sprockets-questions/50289/7 "2008-06-19T18:45:24Z")

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> [@Paulo](#):
>
> 520 refers to the sprocket/chain thickness. with a thinner chain/sprocket combo, there will be less rotating mass, and in most cases you will see a small gain in power.
> 
> But when you gear it differently, i.e. -1 in the front and +2 in the back, the bike accelerates quite a bit faster and takes away from the top speed. (which you should know) this is why stunters go up alot in the rear, for low end power.
> 
> brand will make a difference, stick with the big guys and you shouldn’t have a problem. If you really need to replace the chain, sprockets don’t add much to the cost, so you might as well make a difference on the bike. BUT if you get a 520 chain, you need 520 sprockets. and vice versa.

oh. so it’s like putting smaller wheels with the less rotating mass. so a 520 would be an improvement over the 525 i have now.

as a newer rider, would a big ass sprocket fo da back be a smart move? :mamoru:

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